Home / 712,620.44-983,430.36-390,330.56

Finding the Fourth Proportional to 712,620.44, 983,430.36 and 390,330.56

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Solution

The fourth proportional to 712,620.44, 983,430.36 and 390,330.56 is: 538,663.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,620.44 : 983,430.36 = 390,330.56 : x
  2. Step 2: Convert to fraction form
    712,620.44/983,430.36 = 390,330.56/x
  3. Step 3: Cross multiply
    712,620.44x = 983,430.36 × 390,330.56
  4. Step 4: Simplify right side
    712,620.44x = 383,862,923,139.80
  5. Step 5: Solve for x
    x = 383,862,923,139.80/712,620.44
  6. Step 6: Final answer
    x = 538,663.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.